JP2015155229A - Base carrier of crawler type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To devise an attachment structure of a translifter device to a truck frame and thereby prevent a transportation width of the truck frame from exceeding a vehicle width limit of a trailer.

SOLUTION: Fixing brackets 13 are respectively provided at both sides on an upper surface of a truck frame 12 in a fore and aft direction. Support arm parts 35 which extend from a lifter body part 31 to the fixing bracket 13 side are provided at a translifter device 30. Each connection pin 40 is fitted into arm side pin holes 35a and a bracket side pin hole 13a and a tip part of each support arm part 35 rotates around the connection pin 40 and presses the track frame 12 to detachably attach the translifter device 30 to the truck frame 12.

COPYRIGHT: (C)2015,JPO&INPIT

Description

  The present invention relates to a lower traveling body of a crawler type vehicle.

  Conventionally, in crawler type vehicles such as hydraulic excavators and crawler cranes, the crawler width is expanded to increase stability during work, while the crawler width is reduced during transportation to accommodate trailer transport restrictions. Is known (see, for example, Patent Document 1).

  Specifically, side frames on the outer periphery of which crawlers are mounted are disposed on the left and right sides of the track frame of the crawler type vehicle. The left and right side frames are movable in the left-right direction between a crawler width expansion position where the left and right crawler intervals are maximum and a crawler width reduction position where the crawler intervals are minimum.

  By the way, when a truck frame is loaded on a trailer with a small load capacity and transported, even if the side frame is moved to the crawler width reduction position, the vehicle width limit of the trailer may be exceeded and the trailer may not be mounted. .

  In such a case, since the front and rear width of the track frame is narrower than the left and right width, the lower traveling body is lifted by the translifter device, the side frames are temporarily removed from the track frame, and the front and rear of the track frame are It is designed to be mounted on the trailer in the state of facing left and right.

  Here, the trans-lifter arm of the trans-lifter device is attached to the arm mounting bracket via arm mounting pins that are detachable with respect to the arm mounting brackets provided on both the front and rear sides of the track frame.

JP 2010-064595 A

  However, in conventional crawler type vehicles, mounting brackets for mounting the transformer lifter arms are provided on both the front and rear sides of the track frame (on the left and right sides when mounted on the trailer). It is the widest part of the transport width of the frame. For this reason, even if the side frame is removed from the truck frame, the transport width of the truck frame may exceed the vehicle width limit during trailer transport.

  In addition, a part of the mounting bracket protrudes below the bottom plate of the track frame, which is the lowest ground height of the machine. For this reason, during normal work, there is a risk of getting on rocks or dismantling garages or causing damage.

  The present invention has been made in view of the above points, and its purpose is to devise a structure for mounting the translifter device to the track frame so that the transport width of the track frame does not exceed the vehicle width limit of the trailer. There is to do.

  The present invention includes a track frame, and a pair of left and right side frames that are detachably attached to the left and right sides of the track frame with crawlers attached to the outer periphery, and lift the track frame to the front and rear sides of the track frame. For the lower traveling body of a crawler-type vehicle to which a pair of front and rear translifter devices can be attached and removed, the following solution was taken.

That is, according to the first aspect of the present invention, fixed brackets in which bracket side pin holes penetrating in the left-right direction are formed on both front and rear sides of the upper surface of the track frame,
The transformer lifter device includes a lifter main body, a lift cylinder that lifts and lowers the lifter main body, projects from the lifter main body toward the fixed bracket, and penetrates in the left-right direction corresponding to the bracket-side pin hole. A support arm portion formed with an arm-side pin hole,
The translifter device and the track frame are detachably attached by fitting connection pins into the arm-side pin holes and the bracket-side pin holes,
The tip of the support arm protrudes and extends in the opposite direction to the lifter body from the position where the arm-side pin hole is formed, so that when the track frame is lifted, it contacts the top of the track frame. The track frame is configured to be in contact with the support reaction force of the track frame.

  In the first invention, the fixing bracket is provided on the upper surface of the track frame. The translifter device and the track frame are detachably attached by fitting connecting pins into the arm side pin holes and the bracket side pin holes. When the track frame is lifted by the translifter device, the tip end portion of the support arm comes into contact with the upper portion of the track frame and receives the support reaction force of the track frame.

  With such a configuration, when the translifter device is attached to the track frame, there is no need to project the mounting bracket from both the front and rear sides of the track frame as in the prior art. Thereby, since the widest part of the transport width of the track frame is the front-rear width of the track frame, the transport width of the track frame can be prevented from exceeding the vehicle width limit of the trailer.

  In addition, since the fixed bracket does not protrude below the track frame bottom plate, it is possible to prevent climbing and breakage of rocks and demolition garments during normal work.

  Further, by adopting a structure in which the translifter device and the track frame are connected by the connecting pins, the attaching / detaching operation between the translifter device and the track frame can be easily performed.

According to a second invention, in the first invention,
A reinforcing member is provided on a surface of the track frame that is in contact with the tip of the support arm.

  In the second aspect of the invention, since the reinforcing member is provided on the surface that contacts the tip of the support arm portion, the load applied to the track frame can be received by the reinforcing member.

According to a third invention, in the first or second invention,
Frame side contact portions are respectively provided on the side wall portions on the front and rear sides of the track frame,
The lifter main body is provided with a lifter side abutting portion that abuts on the frame side abutting portion when the lifter main body rotates about the connecting pin toward the side wall of the track frame. It is characterized by being.

  In the third invention, the lifter main body rotates about the connecting pin, and the frame side contact portion and the lifter side contact portion contact each other. As a result, when the track frame and the transformer lifter device are mounted on the trailer and the lift cylinder is separated from the ground, the lifter main body is prevented from rotating around the connecting pin and colliding with the track frame. it can.

According to a fourth invention, in any one of the first to third inventions,
A pair of left and right fixed brackets arranged at intervals from each other are provided on both front and rear sides of the upper surface of the track frame, respectively.
The support arm portion is provided in a pair of left and right with a space between the pair of left and right fixed brackets,
The connecting pins are provided in a pair of left and right to connect the pair of left and right fixed brackets and the support arm part, respectively.
The translifter device is
A guide portion disposed between the pair of left and right support arm portions and extending in parallel along the axial direction of the connecting pin;
While holding the base end portions of the pair of left and right connecting pins, the connecting position where the connecting pins are fitted in the arm side pin holes and the bracket side pin holes, and the connecting pins are removed from the bracket side pin holes. And a pair of left and right pin holding portions that are movable while being supported by the guide portion between a distal end portion of the connecting pin and a release position fitted in the arm side pin hole. It is.

  In the fourth invention, the pair of left and right pin holding portions are movable between the connection position and the release position while being supported by the guide member. The connection position is a position where the connection pin is fitted into the arm side pin hole and the bracket side pin hole. The release position is a position where the connecting pin is removed from the bracket side pin hole and the tip of the connecting pin is fitted into the arm side pin hole.

  With such a configuration, the operator can smoothly attach and detach the connecting pin while supporting the weight of the pair of left and right connecting pins with one guide portion. Further, at the release position, the distal end portion of the connecting pin remains fitted in the arm side pin hole. As a result, the connecting pin is not completely removed from the arm-side pin hole, and there is no possibility that the connecting pin falls. In addition, since the support arm and the connecting pin are integrated, it is not necessary to lift the connecting pin and insert it into the arm-side pin hole when inserting the connecting pin into the bracket-side pin hole again. Work can be done.

A fifth invention is the fourth invention,
It has a stopper part which contacts the pin holding part and positions the pin holding part in the release position.

  In the fifth aspect of the invention, the pin holding part can be positioned at the release position only by moving the pin holding part until it abuts against the stopper part, so that there is no possibility that the connecting pin will fall unintentionally.

  According to the present invention, when the translifter device is attached to the track frame, there is no need to project the mounting bracket from both the front and rear sides of the track frame as in the prior art. Thereby, since the widest part of the transport width of the track frame is the front-rear width of the track frame, the transport width of the track frame can be prevented from exceeding the vehicle width limit of the trailer.

  In addition, since the fixed bracket does not protrude below the track frame bottom plate, it is possible to prevent climbing and breakage of rocks and demolition garments during normal work.

  Further, by adopting a structure in which the translifter device and the track frame are connected by the connecting pins, the attaching / detaching operation between the translifter device and the track frame can be easily performed.

It is a top view which shows the structure of the lower traveling body of the crawler type vehicle which concerns on Embodiment 1 of this invention. It is a perspective view which shows the state which attached the translifter apparatus to the track frame. It is a top view which shows the state which attached the translifter apparatus to the track frame. It is a side view which shows the state which attached the translifter apparatus to the track frame. It is a side view which shows the structure of the translifter apparatus which concerns on this Embodiment 2. It is a top view which shows the state which positioned the connection pin in the connection position. It is a top view which shows the state which positioned the connection pin in the cancellation | release position.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use. In each figure, the up / down and front / rear / left / right directions are indicated by arrows. Unless stated otherwise, the vertical direction will be described according to the directions indicated by these arrows.

Embodiment 1
FIG. 1 is a plan view showing a configuration of a lower traveling body of a crawler type vehicle. The crawler type vehicle 10 of the present embodiment is, for example, a dismantling machine, a hydraulic excavator, a crawler crane, or the like.

  As shown in FIG. 1, the lower traveling body 11 of the crawler type vehicle 10 includes a track frame 12 and a pair of left and right side frames 20. A bearing base 18 to which a swivel bearing (not shown) is fastened is provided at the center on the upper surface side of the track frame 12. The upper swing body (not shown) is slidably mounted on the lower traveling body 11 via a swing bearing.

  Axles 15 extend left and right on the front and rear sides of the track frame 12. The axle 15 is inserted into the axle insertion holes 20 a of the left and right side frames 20. A crawler 21 is mounted on the outer periphery of the left and right side frames 20.

  The left and right side frames 20 are provided so as to be movable in the left-right direction between a crawler width expansion position where the left and right crawler intervals are maximum and a crawler width reduction position where the crawler intervals are minimum. The left and right side frames 20 are expanded and contracted by a hydraulic cylinder 19 provided in the lower traveling body 11. The left and right side frames 20 are connected to the track frame 12 by connecting links 25 at the crawler width extended position and the crawler width reduced position, respectively.

  The connecting links 25 are disposed on both front and rear sides of the track frame 12 and are detachably attached to the track frame 12. The connecting link 25 includes a horizontal beam portion 26 that extends in the left-right direction along the track frame 12, and a link portion 27 that is disposed on each of the left and right sides of the horizontal beam portion 26 and connected to the side frame 20.

  The left and right side frames 20 are detachably attached to the track frame 12. Here, when performing the operation of detaching the side frame 20 from the track frame 12, it is necessary to lift the entire lower traveling body 11 by the translifter device 30. Hereinafter, the mounting structure of the translifter device 30 to the track frame 12 will be described.

  As shown in FIGS. 2 and 3, fixing brackets 13 are respectively provided on the front and rear sides of the upper surface of the track frame 12. Specifically, a pair of left and right fixing brackets 13 arranged at intervals in the left-right direction are provided on the front side and the rear side of the track frame 12, respectively. The fixed bracket 13 is formed with a bracket side pin hole 13a penetrating in the left-right direction.

  A pair of front and rear translifter devices 30 for lifting the track frame 12 are disposed on both front and rear sides of the track frame 12. The transformer lifter device 30 includes a lifter main body 31, a lift cylinder 32, a support arm 35 projecting from the lifter main body 31 toward the track frame 12, and a connection that connects the fixed bracket 13 and the support arm 35. Pin 40.

  The lifter main body 31 extends in the left-right direction along the track frame 12, and cylinder brackets 33 that hold a lift cylinder 32 are attached to the left and right ends thereof. The lift cylinder 32 moves the lifter body 31 up and down by a cylinder rod (not shown) moving up and down in the vertical direction.

  The support arm portion 35 projects integrally from the upper surface of the lifter body portion 31 toward the fixed bracket 13 side. Specifically, the front transformer lifter device 30 is provided with two sets of a pair of left and right support arm portions 35 disposed so as to sandwich the fixing bracket 13 with a gap in the left-right direction. Similarly, the rear transformer lifter device 30 is also provided with two sets of a pair of left and right support arm portions 35 disposed so as to sandwich the fixing bracket 13 with an interval in the left-right direction.

  The support arm portion 35 is formed with an arm side pin hole 35a penetrating in the left-right direction corresponding to the bracket side pin hole 13a. The distal end portion of the support arm portion 35 protrudes and extends in the opposite direction with respect to the lifter main body portion 31 from the position where the arm-side pin hole 35a is formed.

  The connecting pin 40 is detachably fitted in the arm side pin hole 35a and the bracket side pin hole 13a. Specifically, the distal end portion of the connecting pin 40 protrudes outward from the support arm portion 35 when fitted into the arm side pin hole 35a and the bracket side pin hole 13a. A retaining pin 41 is detachably attached to the distal end portion of the connecting pin 40 and is fixed so that the connecting pin 40 does not come off in the axial direction.

  As shown in FIG. 4, the translifter device 30 and the track frame 12 are detachably attached by connecting the connecting pin 40 into the arm side pin hole 35a and the bracket side pin hole 13a. When the track frame 12 is lifted by the lift cylinder 32, the tip end portion of the support arm portion 35 comes into contact with the upper portion of the track frame 12 and receives the support reaction force of the track frame 12. A reinforcing member 14 is provided on the surface of the track frame 12 that abuts against the tip of the support arm 35.

  Further, the lifter body 31 is provided with a lifter-side contact portion 36 that contacts the cross beam portion 26 (frame-side contact portion) of the connecting link 25. The horizontal beam portion 26 and the lifter side abutting portion 36 are provided so that the lifter main body portion 31 is tracked around the connecting pin 40 when the track frame 12 and the transformer lifter device 30 are mounted on the trailer and the lift cylinder 32 is separated from the ground. It pivots and contacts the side wall of the frame 12.

  As described above, according to the lower traveling body 11 of the crawler type vehicle 10 according to the present embodiment, when mounting the translifter device 30 to the track frame 12, the mounting brackets are stretched from both the front and rear sides of the track frame 12 as in the past. There is no need to let it go out. Thereby, since the widest part of the transport width of the track frame 12 is the front-rear width of the track frame 12, the transport width of the track frame 12 can be prevented from exceeding the vehicle width limit of the trailer.

  Further, since the fixed bracket 13 has a structure that does not protrude below the bottom plate of the track frame 12, it is possible to prevent climbing and breakage on rocks and demolition garments during normal work.

  Further, by adopting a structure in which the translifter device 30 and the track frame 12 are connected by the connecting pin 40, the attaching / detaching operation of the translifter device 30 and the track frame 12 can be easily performed.

<< Embodiment 2 >>
FIG. 5 is a side view showing the configuration of the translifter device according to the second embodiment. Hereinafter, the same portions as those in the first embodiment are denoted by the same reference numerals, and only differences will be described.

  As shown in FIGS. 5 and 6, the translifter device 30 includes a guide portion 42 and a pair of left and right pins so that an operator can easily perform the operation of fitting the connecting pin 40 into the bracket-side pin hole 13 a. A holding portion 43 and a stopper portion 45 are provided.

  The pair of left and right support arm portions 35 are connected to each other by a reinforcing beam 47. Specifically, reinforcing beam brackets 47a are attached to the left and right ends of the reinforcing beam 47, and the reinforcing beam brackets 47a are attached to the pair of left and right support arm portions 35, respectively.

  The guide part 42 is formed of a rod-like member extending in parallel along the axial direction of the connecting pin 40. The guide portion 42 is disposed on the back side (rear side in FIG. 6) of the connecting pin 40 when viewed from the translifter device 30 side, and extends across the pair of left and right support arm portions 35. . The guide portions 42 are respectively attached to the pair of left and right support arm portions 35 by guide brackets 42a.

  The pair of left and right pin holding portions 43 is formed of a plate-like body that stands and extends in the front-rear direction. The base end portions of the pair of left and right connecting pins 40 are fastened and fixed to the pin holding portion 43 by fastening bolts 48, respectively, so that they are held at a substantially central position in the front-rear direction of the pin holding portion 43.

  When viewed from the translifter device 30 side, a guide hole 43 a for insertion into the guide portion 42 is formed on the back side (rear side in FIG. 6) of the pin holding portion 43. Thereby, the pair of left and right pin holding portions 43 can move in the left-right direction while being supported by one guide portion 42. Specifically, the pin holding portion 43 includes a connecting position where the connecting pin 40 is fitted into the arm side pin hole 35a and the bracket side pin hole 13a, and the connecting pin 40 is removed from the bracket side pin hole 13a and The distal end portion is movable between the release position (see FIG. 7) fitted in the arm side pin hole 35a.

  On the front side of the pin holding portion 43 (the front side in FIG. 6), a flange portion 44 that protrudes inward in the left-right direction of the vehicle is provided. An engagement hole 44 a is formed in the flange portion 44.

  The pin holding portions 43 are provided on the left and right sides corresponding to the left and right connecting pins 40, respectively. Here, the flange portion 44 of the right pin holding portion 43 and the flange portion 44 of the left pin holding portion 43 have different height positions. Specifically, the flange portion 44 of the right pin holding portion 43 projects to the left at a position higher than the flange portion 44 of the left pin holding portion 43. Accordingly, when the right and left pin holding portions 43 are positioned at the release positions, the flange portions 44 overlap each other in plan view, and the engagement holes 44a communicate with each other in plan view.

  The stopper portion 45 is attached to the guide portion 42, and abuts against the pin holding portion 43 when the pin holding portion 43 is moved from the coupling position to the release position to position the pin holding portion 43 at the release position. Is. Two stopper portions 45 are provided corresponding to the left and right pin holding portions 43.

  With such a configuration, the operator can smoothly perform the attaching / detaching operation of the connecting pin 40 while supporting the weight of the connecting pin 40 with the guide portion 42. As shown in FIG. 7, at the release position, the pin holding portion 43 abuts against the stopper portion 45, so that the distal end portion of the connecting pin 40 remains fitted in the arm-side pin hole 35 a. Thereby, the connecting pin 40 is not completely removed from the arm-side pin hole 35a, and there is no possibility that the connecting pin 40 falls.

  Here, at the release position, the flange portions 44 of the left and right pin holding portions 43 overlap with each other in plan view, so that the flange portions 44 are engaged with each other by the retaining pins 41 and fixed. Specifically, using the retaining pin 41 that is detachably attached to the distal end portion of the connecting pin 40 at the coupling position, the retaining pin 41 is engaged with the engagement holes 44a of the left and right flange portions 44 at the release position. I try to match.

  Accordingly, the connecting pin 40 can be positioned and fixed at the release position, and the retaining pin 41 after being removed from the connecting pin 40 is not likely to be lost. Note that the flange portions 44 may be fixed to each other using a fastening bolt and a fastening nut instead of the retaining pin 41.

<< Other Embodiments >>
About the said embodiment, it is good also as following structures.

  In the present embodiment, two stopper portions 45 are provided corresponding to the pair of left and right pin holding portions 43, but the present invention is not limited to this configuration. For example, by attaching one stopper portion 45 extending in the left-right direction to the center position of the guide portion 42 and causing the left and right pin holding portions 43 to abut on the left end portion and the right end portion of the stopper portion 45, the left and right pin holding portions 43 may be positioned at the release position by one stopper portion 45.

  As described above, the present invention is highly practical in that the transport width of the track frame can be prevented from exceeding the vehicle width limit of the trailer by devising the mounting structure of the translifter device to the track frame. Since the effect is obtained, it is extremely useful and has high industrial applicability.

DESCRIPTION OF SYMBOLS 10 Crawler type vehicle 11 Lower traveling body 12 Track frame 13 Fixed bracket 13a Bracket side pin hole 14 Reinforcement member 20 Side frame 21 Crawler 26 Cross beam part (frame side contact part)
DESCRIPTION OF SYMBOLS 30 Translifter apparatus 31 Lifter main-body part 32 Lift cylinder 35 Support arm part 35a Arm side pin hole 36 Lifter side contact part 40 Connecting pin 42 Guide part 43 Pin holding part 45 Stopper part

Claims (5)

A track frame and a pair of left and right side frames that are detachably attached to the left and right sides of the track frame with crawlers attached to the outer periphery, and a pair of front and rear for lifting the track frame on both the front and rear sides of the track frame A lower traveling body of a crawler type vehicle to which the translifter device of the above can be attached and detached,
Fixing brackets formed with bracket side pin holes penetrating in the left-right direction are provided on both front and rear sides of the upper surface of the track frame,
The transformer lifter device includes a lifter main body, a lift cylinder that lifts and lowers the lifter main body, projects from the lifter main body toward the fixed bracket, and penetrates in the left-right direction corresponding to the bracket-side pin hole. A support arm portion formed with an arm-side pin hole,
The translifter device and the track frame are detachably attached by fitting connection pins into the arm-side pin holes and the bracket-side pin holes,
The tip of the support arm protrudes and extends in the opposite direction to the lifter body from the position where the arm-side pin hole is formed, so that when the track frame is lifted, it contacts the top of the track frame. A lower traveling body of a crawler type vehicle configured to contact and receive a support reaction force of the track frame. In claim 1,
A lower traveling body of a crawler type vehicle, wherein a reinforcing member is provided on a surface of the track frame that comes into contact with a tip portion of the support arm portion. In claim 1 or 2,
Frame side contact portions are respectively provided on the side wall portions on the front and rear sides of the track frame,
The lifter main body is provided with a lifter side abutting portion that abuts on the frame side abutting portion when the lifter main body rotates about the connecting pin toward the side wall of the track frame. A lower traveling body of a crawler type vehicle. In any one of claims 1 to 3,
A pair of left and right fixed brackets arranged at intervals from each other are provided on both front and rear sides of the upper surface of the track frame, respectively.
The support arm portion is provided in a pair of left and right with a space between the pair of left and right fixed brackets,
The connecting pins are provided in a pair of left and right to connect the pair of left and right fixed brackets and the support arm part, respectively.
The translifter device is
A guide portion disposed between the pair of left and right support arm portions and extending in parallel along the axial direction of the connecting pin;
While holding the base end portions of the pair of left and right connecting pins, the connecting position where the connecting pins are fitted in the arm side pin holes and the bracket side pin holes, and the connecting pins are removed from the bracket side pin holes. And a pair of left and right pin holding portions that are movable while being supported by the guide portion between a distal end portion of the connection pin and a release position fitted in the arm side pin hole. Undercarriage of the type vehicle. In claim 4,
A lower traveling body of a crawler type vehicle, comprising a stopper portion that contacts the pin holding portion and positions the pin holding portion at the release position.

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